I was looking into what cylinders need pairing to make a set 0f 180 headers for an LS V8 engine. When looking the pairings shown below. LS firing order 1-8-7-2-6-5-4-3 Passenger (L) side = 1 3 5 7. Driver side (R) 2 4 6 8 1-8-7-2-6-5-4-3 L-R-L-R-R-L-R-L for a 4-1 header I get. 1-7-6-4 8-2-5-3 AND for 4-2-1 180 - Was thinking the 1st pair would be short headers. 1-7 y-pipe > Left Out 6-4 8-2 y-pipe > Right Out 5-3 However I noticed that if I just paired the cylinder ports (inner,outer) as follows I can 4 * 180 pairs as follows 180 pairs into 4 pipes (Twin * 4) 1-7 > out A/L 5-3 > out A/R 6-4 > out B/R 8-2 > out B/L My question would the above arrangement still take advantage of resonance scavenging whilst avoiding the need for headers which link pair from opposite sides at expense of running 4 separate outlets at the rear (I quite like the idea of 4 outlets). What effect would it have on the exhaust note - would sound like 180 headers or some thing different from either a crossplane or flat-plane v8?